CN215483623U

CN215483623U - Hollow slab connecting joint of prefabricated unidirectional rib beam

Info

Publication number: CN215483623U
Application number: CN202122127454.3U
Authority: CN
Inventors: 单珺; 郝崑; 张国秀
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-01-11
Anticipated expiration: 2031-09-06

Abstract

The utility model provides a hollow slab connected node of prefabricated one-way girt, relates to hollow superstructure technical field, including prefabricated bottom plate, the prefabricated girt of setting on prefabricated bottom plate, set up obturator between prefabricated girt, set up cast-in-place coincide layer and the cast-in-place girt of setting in hollow slab concatenation position on the obturator, still be provided with in the prefabricated bottom plate and reserve the short rib, reserve the short rib and transversely set up and one end upwards buckle and stretch into in the cast-in-place girt, be provided with steel bar structure in the cast-in-place girt, steel bar structure is fixed with the help of reserving the short rib, has guaranteed the whole atress performance of hollow slab, has satisfied the assembled requirement of large-span building.

Description

Hollow slab connecting joint of prefabricated unidirectional rib beam

Technical Field

The utility model relates to the technical field of hollow floor systems, in particular to a connecting node of a hollow slab with prefabricated unidirectional ribbed beams.

Background

The assembly type building becomes the trend of the building industry, and the development of the assembly type building is greatly supported by the nation. With the development of the fabricated type, the prefabricated composite floor slab has been widely applied to the existing buildings, but with many houses, the prefabricated floor slab in the prior art generally has the following problems:

firstly, when the prefabricated composite floor slab is used in a large-span structure, a secondary beam needs to be arranged, which inevitably affects the net height of the structure and transmits concentrated load to a main beam, so that the main beam has shear mutation, the stress of the main beam is not facilitated, and the attractiveness of the interior of a building is affected;

secondly, the hollow floor is built in a traditional mode, resource waste and environmental pollution are caused, a large amount of manpower and material resources are consumed, the floor is neither economical nor environment-friendly, reinforcing steel bars extend out of the periphery of the existing prefabricated composite floor slab, and the reinforcing steel bars are likely to be broken in the carrying and transporting process, so that the waste of components is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems, provides a prefabricated one-way ribbed beam hollow slab connecting node, ensures the whole stress performance of a hollow slab, meets the assembly requirement of a large-span building, is convenient to transport and install because reinforcing steel bars laid in a prefabricated bottom plate do not need to extend out of the prefabricated bottom plate, and obviously improves the construction efficiency on the premise of ensuring the bearing performance of a floor system by splicing during construction.

The utility model adopts the technical scheme that the hollow slab connecting node of the prefabricated unidirectional ribbed beam comprises a prefabricated bottom plate, prefabricated ribbed beams arranged on the prefabricated bottom plate, filling bodies arranged between the prefabricated ribbed beams, a cast-in-place laminated layer arranged at the upper end of the filling bodies and cast-in-place ribbed beams arranged at the splicing positions of the hollow slabs, wherein reserved short ribs are also arranged in the prefabricated bottom plate, the reserved short ribs are transversely arranged, one end of each reserved short rib is bent upwards and extends into each cast-in-place ribbed beam, a steel bar structure is arranged in each cast-in-place ribbed beam, and the steel bar structure is fixed by means of the reserved short ribs.

The steel bar structure comprises a stirrup, an upper longitudinal bar and a lower longitudinal bar, wherein the upper longitudinal bar and the lower longitudinal bar are arranged on the stirrup, the cross section of the stirrup is of a rectangular structure, the upper longitudinal bar is arranged at the upper end of the inner side of the stirrup, and the lower longitudinal bar is arranged at the lower end of the inner side of the stirrup.

The prefabricated bottom plate is internally and alternately provided with transverse ribs and longitudinal ribs, and the reserved short ribs are fixed with the transverse ribs and the inner sides of the bent parts are fixed with the longitudinal ribs.

At least one longitudinal bar in the prefabricated bottom plate is positioned at the lower end of the stirrup.

The stirrup is a square spiral stirrup.

And anti-crack mortar is arranged and poured between the hollow plates in a clearance manner.

A groove is formed in the upper end side edge of the prefabricated bottom plate, and the inner wall of the groove is L-shaped.

And the lower end side edge of the prefabricated bottom plate is provided with a pressing groove, and the inner wall of the pressing groove is L-shaped.

And a mesh cloth and a mortar layer are arranged in the pressure tank.

And the prefabricated rib beam is correspondingly provided with wiring holes.

The utility model has the beneficial effects that:

1. the connecting joint forms a close splicing joint through the cast-in-place rib beam to connect the prefabricated bottom plates of the hollow slabs, so that the connecting strength is improved, and the construction is convenient and quick.

2. The prefabricated bottom plate of mill's preparation and prefabricated rib roof beam install additional simultaneously on prefabricated bottom plate and reserve the short muscle, except reserving the short muscle on the prefabricated bottom plate, other reinforcing bars all do not stretch out the bottom plate outside, convenient transportation, during the construction, directly carry out the pouring that cast-in-place rib roof beam carries out fixed stirrup with the help of reserving the short muscle, the construction is showing and is improving, and it is convenient to lay the muscle moreover, further improves the concatenation intensity of hollow slab.

3. During construction, the stirrups are positioned and limited through the grooves, and are preliminarily fixed through reserved short reinforcements, so that the construction is simple and convenient, and the construction efficiency is further improved.

4. During the hollow core slab concatenation, for the clearance setting between the prefabricated bottom plate, lay net cloth and template with the help of the indent, pour anti-crack mortar in the clearance, guarantee joint strength and wholeness, prevent that the seam is too narrow, the grout volume is little inconvenient, can avoid producing the straight joint moreover, influences joint strength and heat insulating ability.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a schematic diagram of a groove structure;

FIG. 4 is an enlarged view of B in FIG. 3;

FIG. 5 is a schematic illustration of a prefabricated floor splice;

fig. 6 is an enlarged view of C in fig. 5.

In the attached drawing, 1, a prefabricated bottom plate, 2, a prefabricated rib beam, 3, a cast-in-place laminated layer, 4, reserved short ribs, 5, stirrups, 6, upper longitudinal ribs, 7, lower longitudinal ribs, 8, anti-crack mortar, 9, grooves, 10, pressure grooves, 11, wiring holes, 12, transverse ribs, 13 and longitudinal ribs.

Detailed Description

As shown in fig. 1-6, the utility model provides a prefabricated unidirectional ribbed beam hollow slab connection node, which comprises a prefabricated bottom plate 1, prefabricated ribbed beams 2 arranged on the prefabricated bottom plate 1, filling bodies arranged between the prefabricated ribbed beams 2, a cast-in-place superposed layer 3 arranged at the upper end of the filling bodies, and cast-in-place ribbed beams arranged at the splicing positions of the hollow slabs, wherein reserved short ribs 4 are also arranged in the prefabricated bottom plate 1, the reserved short ribs 4 are transversely arranged, one end of each reserved short rib is bent upwards and extends into the cast-in-place ribbed beams, a steel bar structure is arranged in each cast-in-place ribbed beam, and the steel bar structure is fixed by means of the reserved short ribs 4.

Prefabricated bottom plate 1 and prefabricated rib beam 2 are at the shaping of mill, the reinforcing bar in the prefabricated bottom plate 1 does not stretch out outside prefabricated bottom plate 1, when the mill is prefabricated, install additional on prefabricated bottom plate 1 and reserve short rib 4, reserve short rib 4 and be L type structure, because prefabricated bottom plate 1 both sides do not stretch out the reinforcing bar, it is very convenient when the transportation, in field construction, splice a plurality of prefabricated bottom plates 1, it fixes a position and spacing to the steel bar structure with the help of reserving short rib 4 to splice the department again, steel bar structure lays and accomplishes the back, space between prefabricated rib beam 2 is filled according to the demand, pour when pouring cast-in-place coincide layer 3 and cast-in-place rib beam at last, the overall structure is convenient for construction, show improvement efficiency of construction.

As shown in fig. 1-2, the steel bar structure includes a stirrup 5, an upper longitudinal bar 6 and a lower longitudinal bar 7, the section of the stirrup 5 is rectangular, the upper longitudinal bar 6 is arranged at the upper end of the inner side of the stirrup 5, and the lower longitudinal bar 7 is arranged at the lower end of the inner side of the stirrup 5.

When steel bar structure installs, stirrup 5 fixes a position, spacing and fixed with the help of reserving short muscle 4, and four interior angle positions in stirrup 5 inboard arrange two on indulge muscle 6 and two under indulge muscle 7, when convenient fixed, guarantee connected node's atress performance.

As shown in fig. 1-2, transverse ribs 12 and longitudinal ribs 13 are arranged in the prefabricated bottom plate 1 in a crossed manner, the reserved short ribs 4 are fixed with the transverse ribs 12, and the inner sides of the bent parts are fixed with the longitudinal ribs 13.

Reserve short muscle 4 simultaneously with the help of prefabricated bottom plate 1 horizontal muscle 12 with indulge muscle 13 fixed, fixed mode is simple effective, improves the fastness of reserving short muscle 4, reserves short muscle 4 and upwards buckles by indulging muscle 13 lower extreme, indulges muscle 13 and is the atress muscle of cast-in-place rib beam, does not influence overall structure's bearing capacity.

As shown in fig. 1-2, at least one longitudinal rib 13 in the prefabricated base plate 1 is located at the lower end of the stirrup 5.

At least one longitudinal rib 13 is arranged in each of two prefabricated bottom plates 1 at the splicing position and is located at the lower end of each stirrup 5 to serve as a stress rib of a cast-in-place rib beam, the bearing capacity cannot be reduced due to splicing, and the number of the longitudinal ribs 13 can be increased according to requirements so as to improve the bearing capacity.

As shown in fig. 1, the stirrup 5 is a square spiral stirrup.

The square spiral stirrup is of an integral structure and has the integral continuous characteristic, the bearing capacity and the anti-damage capacity of the cast-in-place rib beam are obviously improved, the using amount of reinforcing steel bars is saved, the working efficiency is improved, and the engineering quality is ensured.

As shown in fig. 2, the hollow plates are arranged in a gap and poured with anti-crack mortar 8.

When the hollow slabs are spliced, the adjacent prefabricated bottom plates 1 are arranged in a clearance mode, the clearance distance is not less than 0.5cm, anti-crack mortar 8 is poured in the clearance, the problems that the clearance is too small, the amount of poured mortar is small, the connection integrity is poor and the connection strength is reduced are solved.

As shown in fig. 3-6, a groove 9 is arranged on the upper end side edge of the prefabricated base plate 1, and the inner wall of the groove 9 is L-shaped.

The groove 9 is the mounting position of the stirrup 5, the stirrup 5 is conveniently positioned, and when the field construction is carried out, the stirrup 5 is embedded into the groove 9 and is fixed by means of the reserved short ribs 4, so that the construction difficulty is greatly reduced, and the construction efficiency is improved.

As shown in fig. 3-6, the lower end side edge of the prefabricated base plate 1 is provided with a pressing groove 10, and the inner wall of the pressing groove 10 is L-shaped.

The setting of indent 10 becomes the zigzag seam with the concatenation seam of prefabricated bottom plate 1 by the straight joint, has improved joint strength and wholeness nature, improves the heat preservation effect simultaneously.

As shown in fig. 3-6, a mesh cloth and a mortar layer are arranged in the pressure tank 10.

The grid cloth 11 is laid in the pressure tank 10, and a mortar layer is poured, so that the connection integrity and the heat preservation effect are further improved.

As shown in fig. 6, the prefabricated rib beam 2 is correspondingly provided with a wiring hole 11.

Prefabricated ribbed beam 2 is last to be prefabricated to have wiring hole 11, and the position that corresponds with wiring hole 11 increases the through-hole on the obturator, and cast-in-place ribbed beam reserves the through-hole that corresponds according to wiring hole 11 position when the construction, and wiring hole 11 is built-in, and the line is walked to the heart plate inside during the wiring, need not the furred ceiling, does not have the influence, effectual reduction construction cost to the clear height of building use.

Claims

1. Hollow slab connected node of prefabricated one-way girt, including prefabricated bottom plate (1), prefabricated girt (2) of setting on prefabricated bottom plate (1), the obturator of setting between prefabricated girt (2), set up cast-in-place coincide layer (3) and the cast-in-place girt of setting in hollow slab concatenation position on the obturator, its characterized in that: the prefabricated bottom plate is characterized in that a reserved short rib (4) is further arranged in the prefabricated bottom plate (1), the reserved short rib (4) is transversely arranged, one end of the reserved short rib is bent upwards and extends into the cast-in-situ rib beam, a steel bar structure is arranged in the cast-in-situ rib beam, and the steel bar structure is fixed by means of the reserved short rib (4).

2. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 1, wherein: the steel bar structure comprises a stirrup (5), an upper longitudinal bar (6) and a lower longitudinal bar (7) which are arranged on the stirrup (5), wherein the cross section of the stirrup (5) is of a rectangular structure, the upper longitudinal bar (6) is arranged at the upper end of the inner side of the stirrup (5), and the lower longitudinal bar (7) is arranged at the lower end of the inner side of the stirrup (5).

3. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 2, wherein: transverse ribs (12) and longitudinal ribs (13) are arranged in the prefabricated bottom plate (1) in an intersecting mode, the reserved short ribs (4) are fixed with the transverse ribs (12), and the inner sides of the bending positions are fixed with the longitudinal ribs (13).

4. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 3, wherein: at least one longitudinal bar (13) in the prefabricated bottom plate (1) is positioned at the lower end of the stirrup (5).

5. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 2, wherein: the stirrup (5) is a square spiral stirrup.

6. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 1, wherein: and anti-cracking mortar (8) is arranged and poured between the hollow plates in a clearance manner.

7. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 1, wherein: a groove (9) is formed in the edge of the upper end side of the prefabricated bottom plate (1), and the inner wall of the groove (9) is L-shaped.

8. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 1, wherein: the prefabricated bottom plate is characterized in that a pressing groove (10) is formed in the edge of the lower end side of the prefabricated bottom plate (1), and the inner wall of the pressing groove (10) is L-shaped.

9. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 8, wherein: and a mesh cloth and a mortar layer are arranged in the pressure tank (10).

10. A prefabricated unidirectional rib beam hollow slab connection node as claimed in claim 1, wherein: and the prefabricated rib beam (2) is correspondingly provided with a wiring hole (11).